Nanoflower-like NiCo2O4 grown on biomass carbon coated nickel foam for asymmetric supercapacitor

Yang, Guijun; Park, Soo‐Jin

doi:10.1016/j.jallcom.2020.155270

Cited by 67 publications

(46 citation statements)

References 67 publications

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“…As shown in Table 2, the NPC/CMNT/Ni x Co y O z //AC has the same high capacitance as other similar asymmetric supercapacitors [51–54] . The change of specific capacitance with current density in Figure 9 (c) demonstrates that the NPC/CMNT/Ni x Co y O z //AC has a high rate capability for maintaining a high capacity of 95 F g −1 even at 10 A g −1 .…”

Section: Resultsmentioning

confidence: 63%

Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/Ni_xCo_yO_z Nanosheets as a High‐Capacity Electrode Material for Supercapacitors

Cong

Yang²,

et al. 2021

ChemistrySelect

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The N‐doped porous carbon (NPC) /carbon micro‐nanotubes (CMNT) /NixCoyOz nanosheets with rich mesopores and 1.37 wt% nitrogen doping are successfully synthesized by a pyrolysis‐ionization‐precipitation combination process, using coal‐based polyaniline and nickelocene as original materials. Therein, most of the CMNT are upright CMTs and worm‐like curved CNTs, and a few are bamboo‐like tubes or carbon nanofibers. Moreover, many flower‐like aggregates assembled by spinel NiCo2O4 nanosheets are anchored on the surface of the NPC and CMNT. The NPC/CMNT/NixCoyOz exhibits a high specific capacitance and cycling stability, attributed to the large BET specific surface area (485 m2/g), suitable BET average pore size (2.3 nm), good hydrophilicity and wettability, and synergistic effects among three components. The assembled NPC/CMNT/NixCoyOz//AC asymmetric supercapacitor also demonstres a high specific capacitance of 120 F g−1 at a current density of 1 A g−1 and a high energy density of 16.7 Wh kg−1 at a power density of 500 W kg−1.

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Section: Resultsmentioning

confidence: 63%

Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/Ni_xCo_yO_z Nanosheets as a High‐Capacity Electrode Material for Supercapacitors

Cong

Yang²,

et al. 2021

ChemistrySelect

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“…Besides, the O 1‐second spectrum (Figure 3E) resolved into two peaks at ~530.03 and ~531.82 eV, which correspond to the typical metalO bonding and C═O bonding, respectively 29,30 . The high‐resolution spectrum of Ni 2p 3 (Figure 3F) by using Gaussian fitting shows two spin‐orbit doublets, which are characteristic peaks of Ni 2+ (~853.62/871.25 eV) and Ni 3+ (~855.23/872.89 eV) 23,27 . The high‐resolution spectrum of Co 2p (Figure 3G) reveals the existence of two Co‐based components, including 2p 1/2 and 2p 3/2 at ~779.87 and ~798.89 eV.…”

Section: Resultsmentioning

confidence: 96%

“…The high‐resolution spectrum of Co 2p (Figure 3G) reveals the existence of two Co‐based components, including 2p 1/2 and 2p 3/2 at ~779.87 and ~798.89 eV. The peaks at 779.51 eV/795.53 eV assign to Co 3+ and the peaks at 781.53 eV/797.37 eV are assigned to Co 2+ 27,28 . The co‐existence of these ions with two valence states is beneficial to the energy storage of supercapacitor.…”

Section: Resultsmentioning

confidence: 99%

Silver nanoparticles as a conductive bridge for high‐performance flexible all‐solid‐state asymmetric supercapacitor

Dai

Ren

Guo

et al. 2021

Intl J of Energy Research

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Summary With the rapid development of portable electronic devices, it is strongly urgent to explore the flexible and sustainable supercapacitor with lightweight, large power/energy density, good cycle stability, outstanding coulombic efficiency, and excellent operational safety. Herein, a novel and flexible all‐solid‐state asymmetric supercapacitor is assembled from silver (Ag) or/and cobalt acid nickel (NiCo2O4) nanoparticles coated with hollow carbon micro‐skeleton (HCMS‐Ag and HCMS@NiCo2O4‐Ag). The HCMS@NiCo2O4‐Ag electrode is subsequently prepared by a facile hard template combined with hydrothermal method. The morphology analysis shows that plenty of NiCo2O4 nanoflowers composed of a tremendous number of nanoneedles are uniformly grown on the three‐dimensional hollow carbon micro‐skeleton. This unique and novel structure endows the prepared electrode with a high specific capacitance of 527.4 F g−1 at a current density of 0.5 A g−1 and outstanding rate capability of 75%. The assembled pliable asymmetric supercapacitor possesses a maximum energy density of 42.67 Wh kg−1, long cycle life (97.4% capacitance retention), and excellent flexibility. Therefore, this work opens new horizon to develop the next‐generation carbon composites for flexible all‐solid‐state asymmetric supercapacitor with high levels of electrochemical properties.

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“…Besides, the other peaks at B531 eV (O3) and B533 eV (O4) are ascribed to the low coordination of oxygen ions and multiple water molecules on the surface of the NCO micro flowers. 26…”

Section: Structural and Chemical Characterizationmentioning

confidence: 99%

A low-cost and facile electrochemical sensor for the trace-level recognition of flutamide in biofluids using large-area bimetallic NiCo₂O₄ micro flowers

2022

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Nanoflower-like NiCo2O4 grown on biomass carbon coated nickel foam for asymmetric supercapacitor

Cited by 67 publications

References 67 publications

Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/Ni_xCo_yO_z Nanosheets as a High‐Capacity Electrode Material for Supercapacitors

Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/Ni_xCo_yO_z Nanosheets as a High‐Capacity Electrode Material for Supercapacitors

Silver nanoparticles as a conductive bridge for high‐performance flexible all‐solid‐state asymmetric supercapacitor

A low-cost and facile electrochemical sensor for the trace-level recognition of flutamide in biofluids using large-area bimetallic NiCo₂O₄ micro flowers

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Nanoflower-like NiCo2O4 grown on biomass carbon coated nickel foam for asymmetric supercapacitor

Cited by 67 publications

References 67 publications

Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/NixCoyOz Nanosheets as a High‐Capacity Electrode Material for Supercapacitors

Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/NixCoyOz Nanosheets as a High‐Capacity Electrode Material for Supercapacitors

Silver nanoparticles as a conductive bridge for high‐performance flexible all‐solid‐state asymmetric supercapacitor

A low-cost and facile electrochemical sensor for the trace-level recognition of flutamide in biofluids using large-area bimetallic NiCo2O4 micro flowers

Contact Info

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Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/Ni_xCo_yO_z Nanosheets as a High‐Capacity Electrode Material for Supercapacitors

Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/Ni_xCo_yO_z Nanosheets as a High‐Capacity Electrode Material for Supercapacitors

A low-cost and facile electrochemical sensor for the trace-level recognition of flutamide in biofluids using large-area bimetallic NiCo₂O₄ micro flowers